North Korea has signaled that it is losing confidence in the negotiating process with the US and that it may restart its testing program. It is difficult to gauge the seriousness of the threat: it may be real dissatisfaction or merely a bargaining tactic. The North Koreans identified US Secretary of State Pompeo and National Security Adviser Bolton as obstacles to an agreement. The charge is likely accurate as both men have been adamantly opposed to any agreement with North Korea in the past. It is not clear what the US response would be if North Korea restarts its testing program, but there is little reason to believe that the two sides have made much progress in the two summit meetings.